Key takeaways
- Jaw reduction, marketed as V-line surgery, is mandibular angle osteotomy: the surgeon cuts and removes bone from the lower jaw. This is maxillofacial surgery, not a cosmetic touch-up.
- The inferior alveolar nerve runs inside the mandible, which makes nerve injury the defining hazard of the operation.
- Reported complications include lower lip numbness, haematoma, infection and soft-tissue ptosis, meaning sagging of the tissues over the reshaped bone.
- Where zygoma reduction is added, soft-tissue sagging, nonunion, malunion and paresthesia are the commonest complications, with undercorrection and asymmetry the commonest aesthetic disappointments.
- Bone and soft tissue keep remodelling long term, so the result cannot be judged, and revision cannot sensibly be planned, before you are long home.
- Ghost surgery, where someone other than the contracted surgeon operates, has been analysed as a legal problem in South Korea and named by that country's own profession as something to eradicate. Get who will operate in writing, wherever you go.
- We do not publish price figures for this operation, and no published UK private price appears in the sources we rely on. The clinic's written, itemised quote is the real figure for your case.
- This is general information, not medical advice. Your surgeon gives the medical advice.
The word "contouring" makes this sound like a finishing touch. It is not. The surgeon cuts through the lower jaw, removes bone, and works within millimetres of a nerve that supplies your lower lip and chin. Everything else in this guide follows from that fact. For the wider picture across cosmetic surgery, start with our plastic and cosmetic surgery guide.
What it is
Jaw reduction narrows the lower face by removing bone from the mandible, the lower jaw. A 2026 review in JPRAS Open describes a family of mandibular angle osteotomy techniques that differ mainly in the starting point, endpoint and trajectory of the osteotomy line, including long curved osteotomy, ABC osteotomy, U-shaped and V-line variants, outer cortex reduction and body osteotomy. Genioplasty, which repositions the chin bone, and partial masseter resection are described alongside them as parts of the same contouring repertoire.
That list is the honest description of what "V-line" refers to. It is not one operation with a fixed definition. It is a set of bone cuts, chosen and combined, performed by craniomaxillofacial surgeons.
Facial contouring in this sense often includes the cheekbones as well, through zygoma reduction, which carries its own complication profile covered below. Some plans also include work on the chin, where the choices differ again and are set out in our chin augmentation guide.
For scale, the ISAPS global survey for 2024 recorded nearly 38 million aesthetic procedures worldwide including more than 17.4 million surgical ones, with face and head procedures exceeding 7.4 million. The survey names the United States, Brazil and Japan as the leading countries by volume, which is worth knowing if you have absorbed a different assumption about where this surgery is concentrated.
Am I a candidate
The first question is what makes your lower face wide, because the answer decides whether bone surgery is the right instrument at all. Width can come from the bone itself, from the masseter muscles used in chewing, from soft tissue, or from a combination. Only the first is treated by cutting bone.
That assessment needs imaging and an examination, not a photograph or a filter. A surgeon planning osteotomy lines is working from three-dimensional information about your mandible, and any consultation that skips this stage is not planning surgery, it is selling it.
Your future dental and jaw treatment matters too, and it is rarely raised. A study of nerve injury in orthognathic surgery found that prior reduction mandibuloplasty raises the incidence of nerve injury during a later sagittal split osteotomy. If there is any prospect that you will need corrective jaw surgery for your bite in future, that consequence belongs in today's decision.
Expectations get screened here as much as anatomy. The RCS asks patients to consider whether they would be content with a reasonable improvement rather than perfection, and to budget for planned and possible costs rather than the procedure alone. With bone surgery, the possible costs include revision, and revision here is harder than the original operation. Candidacy is the clinic's surgeon's decision after examining you.
If nasal surgery is also on your list, put the whole plan to one surgeon rather than assembling it clinic by clinic, because combining operations lengthens anaesthetic time and changes the risk conversation. Our rhinoplasty guide covers that operation separately.
How it works
The surgeon plans an osteotomy line along the jaw and removes the bone segment, sometimes combining an angle osteotomy with outer cortex reduction to narrow the jaw when seen from the front rather than only from the side. Access is usually from inside the mouth, and the specific technique chosen depends on your bone and the shape you and the surgeon have agreed.
Ask which combination is planned and what each cut is intended to achieve. Because the variants differ in trajectory rather than in kind, a surgeon should be able to explain their plan on your own imaging rather than in generic terms.
Small technical choices are studied too. A modern series of mandible contouring cases compared drainage against none, reporting bleeding or haematoma at 0.59% without drains and 0% with them, and infection at 1.18% against 0.76%, with no statistically significant difference between the groups. It is a reasonable thing to ask about, and the honest answer is that the evidence does not settle it.
This is general anaesthetic surgery, which sets the shape of the trip. The RCS checklist covers anaesthetic type, length of stay and who takes you home. The NHS explains that the anaesthetic team is led by a specialist doctor who monitors and adjusts the anaesthetic throughout, which is exactly what to confirm abroad. The FCDO advises that anyone receiving general anaesthesia should plan to be in country for at least ten days after surgery.
Recovery and aftercare
Early recovery is dominated by swelling, restricted mouth opening and a soft or liquid diet while intraoral wounds heal. Speaking and eating are both affected, and the face at two weeks bears little relation to the face at six months.
The longer arc is what distinguishes this operation from the rest of the cluster. The JPRAS Open review stresses long-term remodelling of bone and soft tissue and recommends long-term three-dimensional assessment of results. In plain terms, the contour keeps changing well after you feel recovered, so the result cannot be judged, and a revision cannot sensibly be planned, until you have been home for a long time.
Flying is restricted first. The NHS advises avoiding air travel for seven to ten days after facial cosmetic procedures because surgery and flights both raise the risk of a blood clot, and advises resting rather than sightseeing, swimming or sunbathing while abroad. Your surgeon sets your own clearance to fly on top of that advisory.
All of which makes the follow-up arrangement the most important thing you negotiate. Aftercare is the clinic's: it sets the plan, reviews healing and remains your first contact for numbness, swelling that worsens, or any sign of infection. We coordinate that follow-up from home.
Risks and how clinics manage them
The inferior alveolar nerve is the reason this operation is different. It runs through the mandible, supplying sensation to the lower lip and chin, and the osteotomy lines pass through its neighbourhood. Nerve injury is therefore the defining hazard rather than an unlucky outlier.
Reported complications of mandibular contouring include lower lip numbness, haematoma, infection and soft-tissue ptosis. Ptosis here means the soft tissue sagging once the bone that supported it has been reduced, which is a structural consequence rather than an error, and one worth understanding before surgery.
Where the cheekbones are reduced in the same plan, add the zygoma profile. A review of zygoma reduction reports that soft tissue sagging, nonunion, malunion and paresthesia are the most common complications, with undercorrection and asymmetry the most common aesthetically unfavourable sequelae. Nonunion and malunion mean cut bone failing to heal together, or healing in the wrong position.
There is also the future consequence noted above: prior reduction mandibuloplasty raises nerve injury risk in later sagittal split osteotomy. Few consultations mention it, and it is a fair question to put to a surgeon directly.
Clinics manage these risks in ways you can interrogate: three-dimensional imaging and planning before surgery, the surgeon's craniomaxillofacial training, technique chosen for your anatomy with the nerve mapped, decisions on drainage, monitored inpatient recovery, clear instructions on what to report once you are home, and long-interval reviews rather than a single discharge. BAAPS sets the ceiling on any of it: no procedure is 100% risk free and no surgeon can give a 100% guarantee of the results.
One more piece of context belongs here. The RCS notes that if things go wrong after surgery abroad, the NHS is unlikely to help you other than in an emergency. A BMJ Open rapid review published in 2026 covering 655 patients treated between 2006 and 2024 found NHS costs from outward medical tourism for elective surgery ranged from £1,058 to £19,549 per patient in 2024 prices, on very low certainty evidence, and concluded the true burden is unknown.
Cost by country
We do not publish price figures for jaw reduction, and the sources we rely on contain no published UK private price for it. That gap is real and worth stating, because this procedure is marketed heavily and quoted loosely, and a number lifted from a different operation would tell you nothing useful.
What actually determines the fee is the scope of the surgery. How many osteotomies, whether the cheekbones or chin are included, operating time, the fixation used, imaging and planning, the anaesthetic team, the length of inpatient stay, the surgeon's training and seniority, and how many follow-up appointments the fee includes. A plan that combines jaw, cheekbone and chin work is a much larger operation than an angle reduction alone, and the quote should show which of those you are buying.
Then price the trip honestly. Flights are usually not part of a clinic's package, and a stay of ten days or more means accommodation, food and possibly a companion. Because the result settles over months, budget for the possibility of returning. Our jaw reduction cost breakdown works through the whole picture, including the return journey a revision would require.
Whatever you compare, the clinic's written, itemised quote is the real figure for your case. It should follow proper assessment and imaging, list every component separately, and nothing should be added to it without your express agreement.
Choosing a clinic
Start with training, because this is bone surgery. Ask whether the surgeon is registered as a specialist in their own country for craniomaxillofacial or plastic surgery, and ask to see the registration. The RCS makes the general point that a doctor providing private cosmetic surgery in the UK need only hold GMC registration and a licence, and strongly recommends the specialist register plus insurance for the specific procedure. Abroad, the equivalent question is the one to ask.
Then get in writing who will actually operate, and treat that as a non-negotiable step rather than a courtesy. The reason is documented in the peer-reviewed literature. Ghost surgery, where someone other than the surgeon the patient contracted performs the operation, has been analysed as a legal problem in South Korea, with the authors noting that charges of bodily harm, assault and battery, and fraud could be applied under Korean law. The Korean profession itself published a position under the title Ghost Surgeries Must Be Eradicated, and mandated operating-room CCTV followed as the regulatory response.
Read that as a problem the profession named and the state legislated against, rather than as a verdict on any country or clinic. The practical lesson is universal: name the operating surgeon in your written agreement wherever you have surgery. The FCDO gives the same instruction more briefly, advising you to check that the surgeon you consult with will be the person carrying out the procedure. NaTHNaC adds that credentials should be independently verified and references requested before travel. When we verify clinics, we mean administrative checks of licences, registrations and claimed accreditations, not a guarantee about your result. If you are looking at Korea specifically, our South Korea destination guide covers the practical side of travelling there.
Ask each clinic, in writing:
- Who will perform the surgery, named, and will they be present for all of it?
- What is their specialist registration and training in craniomaxillofacial surgery?
- What imaging and planning happens before the osteotomy is designed?
- Which cuts are planned, and how will the inferior alveolar nerve be protected?
- Does the facility have inpatient beds, resuscitation capability and overnight medical cover?
- What review schedule do you offer over the months while the result is remodelling, and who pays if revision is needed?
The RCS also advises obtaining the contact details of a named doctor rather than a helpline, clarifying what aftercare includes and excludes, and confirming you share a language well enough to communicate properly. The FCDO adds that you should receive a full medical report in English to bring back to your own doctor, which for this operation should describe exactly which osteotomies were performed.
A coordinator prepares your case file for the clinic's surgeon, chases those answers and makes sure the quote you compare is itemised. The clinical decisions remain the surgeon's.
FAQ
Is V-line surgery the same as jaw reduction?
Broadly yes. V-line is a marketing name for a group of mandibular angle osteotomy techniques that differ in the starting point, endpoint and trajectory of the bone cut, sometimes combined with chin surgery, outer cortex reduction or masseter work. Ask which specific procedures your plan contains.
What is the main risk of jaw reduction surgery?
Nerve injury. The inferior alveolar nerve runs inside the mandible and supplies sensation to the lower lip and chin, so it sits in the surgical field. Reported complications also include haematoma, infection and soft-tissue ptosis, with zygoma reduction adding sagging, nonunion, malunion and paresthesia.
How long until I know what I look like?
Longer than you expect. The review evidence stresses long-term remodelling of bone and soft tissue and recommends long-term three-dimensional assessment, so the contour keeps changing after you feel recovered. Judging the result or planning revision early is a mistake.
How do I make sure my surgeon is the one operating?
Name them in the written agreement, confirm it at the consultation with the operating surgeon, and ask directly whether anyone else will perform any part of the surgery. Ghost surgery has been analysed as a legal problem in South Korea and named by the Korean profession itself, which is why the question is standard rather than rude.
Will this affect future jaw or orthodontic treatment?
It can. Published evidence found that prior reduction mandibuloplasty raises the incidence of nerve injury during a later sagittal split osteotomy, which is the operation used to correct jaw position. If corrective jaw surgery is a possibility for you, raise it before, not after.
Is this medical advice?
No. This guide is general information to help you prepare questions. Your surgeon gives the medical advice, and whether jaw reduction suits you can only be decided after an examination and imaging.